Mechanical telautograph



Feb. 11, 1939.

Filed Aug, 3, 1928 Patented Feb. 11, 1930 MAX AFTERG'UT, OFBERLIN-SCHONEBERG, AND JEHUDA PRASHKER, F BERLIN- CHARLOTTENBURG,GERMANY MECHANICAL TELAUTOGRAPH Application filed August 3, 1928, SerialNo. 297.354, and in Germany August 3, 1927.

a In accordance therewith the improved devlce or apparatus comprises, ingeneral, a y

transmitting apparatus and a reproducing apparatus or a transmitter anda receiver and the interconnection between these two appa- V ratusesiseffected by means of cables, or the like, preferably B-owdentransmissions or Wires,

A main feature of the present invention re sides in that the movementsof the writing member both of the transmitter and of the receiverstationare resolved into two intersecting components and the movementscorresponding to said components are transmitted by cables independentlyof each other.

One of the objects of our invention is the provision of a device whichwill reproduce writings at a point distant from that at which they areoriginally made.

" Another object of our invention is the construction of a device of thecharacter described in which the transmitted writings may be made on aplane surface such as a table top.

Still another object of our invention isthe production of-a device whichis simple to op- :erate but which exactly re roduces the writings madeeither in magni ed, diminished or normal form.

With the above recited and'other objects in view, theinvention residesspecifically in the novel construction set forth in thefollowingspecification, particularly pointed cut in the appended claims andillustrated 111 the accom anying drawings, itbeing understood, that t 1erlght is reserved to embodlments other than those illustrated therein,to the full extent indicated byjthe general meaning of the terms inwhich the claims are expressed.

In the accompanying drawings forming a part of this specification andshowing, for purposes of exemplification, a preferred form and manner inwhich the invention may be embodied and practiced, but without limitingthe claimed invention to such illustrative instance:

Figure 1 is a diagrammatic view of the transmitting (or receiving)apparatus;

F1gure2 illustrates the transmitting apparatus and the receivingapparatus in mutual relation to each other;

Figure 3 is a partial or fragmentary view of the writing device of thereceiving apparatus and Figure 4 isa partial or fragmentary view of thewriting device of the transmitting apparatus.

Referring to Figure 1 the character 1 designates a column adapted toberotated about itsvertical axis and which is supported near its two endsby a U-shaped post or standard 2. The one end of the column 1 isprovided with an arm carrying a grooved roller or pulley 3 adapted torevolve about a horizontal axis or pivot and which is firmly connectedwith a writing arm 45, while the other end of the column is centrallyfixed to a horziontally running grooved roller or pulley 5. The free endof the writing arm '1 carries the writing,

member which will be described more in 'detail hereinafter. Thewritingmember is constructed and adapted to accomplish both a vertical circularmovement about the horie zontal axis of rotation of the grooved roller 3and a horizontal circular movement about the vertical axis of thecolumn 1. Either movement of the writing memberthus isjdecomposed intothese two circular components which are in perpendicular relationshipwith regard to each other. a

The transmissionof the vertical component is effected by means of acable placed and guided in the groove of the roller 3.

This cable passes through the hollow shaft of the rotatory column 1 onthe one hand directly and on the other hand through the agency of thedeflecting roller 6 and firmly connected with the cables of the twoBowden transmissions 10 and 11 after having been changed in direction bymeans of the two reversing rollers 8 and 9 mounted in the socket or baseof the apparatus. The two Bowden cables 10 and 11 are, at the oppositeend, attached to a rope or cable which is likewise placed in acorresponding grooved roller 3'of the apparatus located there, so thatany angular movement of the one grooved roller will innnediately causethe other grooved roller to perform an analogous angular movement in thesame direction.

The horizontal component of the movement of the writing member causesthe column 1 to turn about its vertical axis, and this turning movementis transmitted in a similar manner to the corresponding grooved rollerof the receiving apparatus by means of a rope or cable placed andrunning over the grooved roller 5. Thus the two apparatuses areassociated with each other by means of two pairs of ropes or cableswhich will act independently of each other to transmit the components ofthe movement of the one apparatus to the other apparatus, so that thewriting movement of the receiver constitutes a resultant of thesaid twocomponents. It 'will be seen that by suitably dimensioning the diameterof the said two grooved rollers it will be possible to transmit thewritings or signals in their original size or on a reduced or anenlarged scale.

Figure 2 illustrates the two apparatuses in their mutual action. 12designates the transmitting apparatus and 13 denotes the receivingapparatus, the two apparatuses being interconnected by the two pairs ofropes or cables l t and 15, respectively. It will be seen in Figure 2that the relative location of the two apparatuses is absolutelyindependent of each other. The apparatus comprising the receivingstation is generally similar to. that comprising the sending station.

In Figure 3 the character 16 indicates the extremity of the writing armof the. receiving apparatus having a bore for the reception of thewriting pin or stylus 17, properly speaking, the latter being providedwith a longitudinal capillary bore and equipped or connected at its rearend, with a reservoir or container 18 for ink or the like. A spring 19is provided for pressing the front end of the stylus against the'writingsurface 20. Rigidly connected with the stylus is an extension orprojection 21 on which the envelope or casing 22 of a Bowdcntransmission terminates whereof the cable 23 passes,

through the said projection 21 and is connected, at its end. with asleeve 25, a spring 24 being inserted intermediate between the twoconnected members. The sleeve 25 is wards the writing surface inparallelism to i the stylus so as to prevent the stylus from coming intouch with the writing surface when the projection 26 occupies theposition shown in Figure 3. Consequently the stylus will come in contactwith the writing surface only when the projection is withdrawn on thestylus by means of the Bowden transmission.

In Figure 4; the character 27 denotes the extremity of the writing armof the trans mitting apparatus having a longitudinal bore 28 for guidingthe stylus holder 29 properly speaking. The latter is connected, bymeans of a universal joint 80, with a sleeve 31 for the reception of alead pencil 32. The sleeve 31 in turn is connected with a guiding sleeve33 in which a pin 34 is mounted and adapted to slide therein. The pin 34is provided at its lower end with a ball 35 and connected with the cable23 of the Bowden transmission (see Figure 3), so as to cause the writ-'pin in the sleeve 33 actuating an electrical contact for closing oropening the circuit .of an electro-magnet 36 attached to the receivingapparatus and whereof the armature 37 is connected with the cable 23 ofthe Bowden transmission, (see Figure 1).

A device constructed and arranged as herein described is adapted forvarious uses of transmitting writings or signals from one station toother places situated at distances remote therefrom, such as for examplein case of delivering lectures, on ships or other vehicles and forsimilar purposes and particularly in cases where it is desired totransmit signals on an enlarged or reduced scale.

In the former case, that is to say, when the signals are to betransmitted on an enlarged scale, it will not be necessary anymore forthe lecturer to write his explanations on a black board since he nowwill be enabled to have his writings reproduced without any trouble fromhis reading desk and at any desired enlarged scale by operating atransmitting device.

A device according to the present invention, however, is alsoparticularly useful and applicable for advertising purposes. In such -acase the transmitter 12, (see Figure 2),

may be put up in a room which is not visible to the public, while thereceiving or reproducing apparatus isto be placed in a showwindow andmay be enveloped in and draped to constitute a doll with the writing armenclosed in one arm of the doll and the rotary column enclosed in thebody thereof. Thus the arm of the doll will reproduce on a writingsurface visible to the public, all those writings and signals whichtheperson in attendance of the transmitting apparatus writes down forthe'reproduction' purpose;

We are aware that minor changes in the" arrangement, construction andcombination of the several parts of our improved apparatus or plant canbe made and substituted for those herein shown and described without inthe least departing from the nature and principle of the invention. Nordoes it seem necessary to burden this specification with a detailedexposition of the advantages which the invention possesses, for theywill be apparent to those skilled in the art to which this inventionrelates. Furthermore a detailed description of the operation of the saidapparatus or plant is deemed unnecessary and is therefore omitted in theinterest of brevity.

What we claim is 1. Apparatus for transmitting writings from one stationto a second station at a distance therefrom, comprising a transmitterand a receiver each provided with a writing member, a pair of cablesinterconnecting said writing members with each other and positivelytransmitting the movement of the writing member of the transmitter tothat of the receiver, said transmitter and receiver each comprising apivoted carrier, an actuating arm for a writing member pivoted thereon,said arm being movable at every angular position of the carrier in aplane parallel to the axis of rotation of said carrier.

2. Apparatus for transmitting writings from one station to a secondstation at a distance therefrom, comprising a transmitter and a receivereach provided with a writing member, a pair of cables interconnectingsaid Writing members and positively transmitting the movement of thewriting member of the transmitter to that of the receiver, saidtransmitter and receiver each comprising a rotatable pulley forming aguide for one of the two cables, ail-actuating arm for a writing memberfirmly mounted thereon, a rotatable carrier, said pulley being mountedthereon, the axis of rotation of said carrier being perpendicular to theaxis of said pulley, a second pulley secured to said rotatable carrierfor rotating the same about its" axis and forming a guide for the secondcable.

3. A receiving or reproducing device for use in connection with atransmitting apparatus as claimed in claim 2, and having flat writingsurfaces, wherein said writing member is adapted to be elasticallydisplaced in the longitudinal direction of the actuating or writing arm.

4. In areceiving or reproducing device for use inconnection with atransmitting apparatus as claimedin claim 2, a writing member holder andmeans mounting the same for displacement in the longitudinal directionof the actuating or writing arm so that only those components of thewriting movements will be transmitted which are in parallelism to theflat writing surface.

5. Apparatus for transmitting writings from one station to a secondstation at a distance therefrom as claimed in claim 2, in combinationwith means for synchronously interrupting the writing movement,comprising a pin slidable on the writing surface of the transmittingdevice, a Bowden transmitting connection operable by said pin when thelatter is displaced in the direction of the longitudinal axis of theactuating arm, and

electromagnetic means cooperating with said Bowden transmittingconnection for raising and lowering the writing member of the receiversynchronously with the raising and lowering of the writing member of thetrans mitter.

6. Apparatus for use in transmitting writings from one station to asecond station, disposed at a distance from said first station, saidapparatus including a transmitter comprisinga writing member, mountingmeans pivoted for rotation about an axis, carrying means for saidwriting member pivotally supported on said mounting means for rotationabout an axis perpendicular to said first mentioned axis, a receiversimilar to said transmitter and means cooperating with said mountingmeans for transmitting the movements of said writing member of saidtransmitter to the writing member of said receiver.

In testimony whereof, we affix our signatures.

MAX AFTERGUT. JEI-IUDA PRASHKER.

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